Biology

In rodents, repeated messenger RNA treatment produces no dangerous side effects, setting stage for clinical trial

Carbon analysis detects three kinds of microbes in ancient Australian rocks

Samples caught in Burmese amber provide clues to the evolution of the parasites and their hosts

Studies reveal potentially dangerous responses to human activities

New study represents first clear success against the inherited blood disorder

Three new approaches increase the size of DNA "origami" more than 20-fold

Study firms up evidence that disulfiram slows tumor growth

New technology could degrade toxins, facilitate organ transplants

Tiled, curved mirrors help improve peripheral vision in dim light

Engineered microbes use unnatural DNA bases to make life’s building blocks

Handedness gives lefties advantage in high-speed sports

Structural changes help this insect survive where most life can’t

But consumer distrust could slip up disease-resistant variety

Juno Therapeutics says it is developing a safer T-cell therapy

Study of Amish community suggests that alteration protects against age-related diseases

Studies of people receiving immunotherapies may clarify how normal diabetes arises